光纤折射率剖面的折射近场法测量的研究

Refracted near-field technique for the measurement of optical fiber refractive index profiles

本文叙述了折射近场法(简称RNF)测量光纤折射率剖面的基本原理及实验方法.提供了对单模光纤和多模光纤的测量结果,并与反射法、近场法进行了比较.实验中获得空间分辨率优于0.8μm,折射率灵敏度优于2×10^(-4).

The basic principle and experimental method of refracted near-field technique for the measurem nt of optical fiber refractive index profiles are described. The measured results for multimode and mono-mode fiber profiles are provided and compared with that by reflection technique and near-field technique. The spatial resolution better than 0.8μm, and refractive index sensitivity better than 2×10-4 are obtained in the experiment.